阅读说明：本技术 一种立式橡筋机 (Vertical elastic sewing machine ) 是由 罗从林 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种立式橡筋机,其特征在于,包括机架,机架上沿左右方向依次设置有：供料机构,用于盛放橡筋；定位夹,竖直设置并可夹持或松开橡筋的端部；剪断机构,用于剪断橡筋；第一夹爪,竖直设置并可夹持或松开橡筋；第二夹爪,竖直设置并可夹持或松开橡筋,第二夹爪可沿左右方向滑动以靠近或远离定位夹,第二夹爪可夹持定位夹上的橡筋的端部并拉出一定距离的橡筋,第一夹爪和第二夹爪可在水平方向上反向转动；供胶件,设置有胶水,供胶件可沿左右方向移动以使第二夹爪上的橡筋的端部可粘取胶水。本发明中的立式橡筋机,能够实现橡筋生产过程中的自动剪断及自动粘接,可提高生产效率、降低人工成本。(The invention discloses a vertical elastic sewing machine which is characterized by comprising a rack, wherein the rack is sequentially provided with the following components in the left and right directions: the feeding mechanism is used for containing rubber bands; the positioning clamp is vertically arranged and can clamp or loosen the end part of the rubber band; the shearing mechanism is used for shearing off the rubber band; the first clamping jaw is vertically arranged and can clamp or loosen a rubber band; the second clamping jaw is vertically arranged and can clamp or loosen the rubber band, the second clamping jaw can slide along the left and right directions to be close to or far away from the positioning clamp, the second clamping jaw can clamp the end part of the rubber band on the positioning clamp and pull out the rubber band at a certain distance, and the first clamping jaw and the second clamping jaw can reversely rotate in the horizontal direction; the glue supplying part is provided with glue, and the glue supplying part can move in the left and right directions so that the glue can be adhered to the end part of the rubber band on the second clamping jaw. The vertical rubber band machine can realize automatic shearing and automatic bonding in the rubber band production process, improve the production efficiency and reduce the labor cost.)

1. The utility model provides a vertical rubber band machine, its characterized in that, includes frame (100), frame (100) are gone up and are set gradually along left right direction:

the feeding mechanism (200) is used for containing rubber bands (300);

the positioning clamp (400) is vertically arranged and can clamp or loosen the end part of the rubber band (300);

the shearing mechanism (500) is used for shearing the rubber band (300);

the first clamping jaw is vertically arranged and can clamp or loosen the rubber band (300);

the second clamping jaw (600) is vertically arranged and can clamp or loosen the rubber band (300), the second clamping jaw (600) can slide along the left-right direction to be close to or far away from the positioning clamp (400), the second clamping jaw (600) can clamp the end part of the rubber band (300) on the positioning clamp (400) and pull out the rubber band (300) for a certain distance, and the first clamping jaw and the second clamping jaw (600) can reversely rotate in the horizontal direction;

the glue supplying part (700) is provided with glue, and the glue supplying part (700) can move in the left-right direction to enable the end part of the rubber band (300) on the second clamping jaw (600) to be adhered with the glue.

2. The vertical elastic sewing machine according to claim 1, wherein the first jaw is movable in a vertical direction.

3. The vertical type elastic sewing machine according to claim 1, characterized in that a glue containing groove (710) is formed in the surface of the glue supply member (700) along the vertical direction, glue is arranged in the glue containing groove (710), the end portion of the elastic sewing machine (300) clamped by the second clamping jaw (600) can be inserted into the glue containing groove (710), a glue supply hole (720) is formed in the upper portion of the glue supply member (700), the glue supply hole (720) is communicated with the glue containing groove (710), and the glue can flow into the glue containing groove (710) through the glue supply hole (720).

4. The vertical elastic sewing machine according to claim 3, wherein the glue supply hole (720) is formed in the left-right direction, an opening (730) is formed in the side face of the glue supply piece (700), the opening (730) penetrates through the glue supply piece (700) in the left-right direction and is communicated with the glue supply hole (720), a through hole (740) and a threaded hole (750) are coaxially formed in the glue supply piece (700) in the vertical direction, the through hole (740) and the threaded hole (750) are communicated with the opening (730), the through hole (740) is located above the opening (730), and the threaded hole (750) is located below the opening (730).

5. A vertical elastic sewing machine according to claim 3, characterized in that the bottom of the glue tank (710) is provided with a recovery hole and a slope (760) inclined towards the inside of the glue tank (710), and the glue can flow into the recovery hole along the slope (760).

6. The vertical elastic sewing machine according to claim 1, further comprising a glue supply bracket (800) arranged on the frame (100) in a left-right sliding manner, wherein the glue supply member (700) is arranged on the glue supply bracket (800), and the glue supply member (700) can move in the left-right direction relative to the glue supply bracket (800).

7. The vertical elastic sewing machine according to claim 6, characterized in that the glue supply bracket (800) is provided with a locking chuck (810), and the locking chuck (810) can clamp the upper part of the second clamping jaw (600) in the front-back direction.

8. The vertical elastic sewing machine according to any one of claims 1 to 7, characterized in that the second clamping jaw (600) comprises a first clamping head (610) and a second clamping head (620), the first clamping head (610) and the second clamping head (620) can move towards or away from each other along the front-back direction, the first clamping head (610) is provided with a first semicircular hole (611), the second clamping head (620) is provided with a second semicircular hole (621) corresponding to the first semicircular hole (611), the first semicircular hole (611) and the second semicircular hole (621) can mutually enclose to form a through hole (630), the end of the elastic sewing machine (300) can pass through the through hole (630), and the inner diameter of the through hole (630) is smaller than the inner diameter of the elastic sewing machine (300).

9. The vertical elastic sewing machine according to claim 8, characterized in that the first semicircular hole (611) is formed in one side of the first clamping head (610), the other side of the first clamping head (610) is provided with a guide hole (612), the guide hole (612) is a major arc hole, the second clamping head (620) is provided with a matching plane (622), the guide hole (612) and the matching plane (622) can jointly enclose a combined guide space (640), the through hole (630) and the guide space (640) are coaxially arranged, the end of the elastic sewing machine (300) can sequentially penetrate through the through hole (630) and the guide space (640), and the inner diameter of the guide space (640) is larger than the inner diameter of the elastic sewing machine (300).

10. A vertical elastic sewing machine according to claim 9, characterised in that the guide hole (612) is provided with a rounded corner at the edge of the major arc.

Technical Field

The invention relates to the field of rubber band manufacturing, in particular to a vertical rubber band machine.

Background

The rubber band is a rubber product, has elasticity, can be used for tying hair, and can be placed on clothes such as gloves, clothes, trousers, etc. to prevent the clothes from loosening. The existing rubber band is manufactured by manually cutting off coiled rubber bands, and manually adhering glue to the end parts of the cut rubber bands and bonding the two ends of the rubber bands together. The production mode of manual shearing and bonding has high labor cost and low production efficiency.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a vertical rubber band machine which can realize automatic cutting and automatic bonding in the rubber band production process, improve the production efficiency and reduce the labor cost.

The vertical elastic sewing machine is characterized by comprising a rack, wherein the rack is sequentially provided with the following components in the left and right directions: the feeding mechanism is used for containing rubber bands; the positioning clamp is vertically arranged and can clamp or loosen the end part of the rubber band; the shearing mechanism is used for shearing the rubber band; the first clamping jaw is vertically arranged and can clamp or loosen the rubber band; the second clamping jaw is vertically arranged and can clamp or loosen the rubber band, the second clamping jaw can slide along the left-right direction to be close to or far away from the positioning clamp, the second clamping jaw can clamp the end part of the rubber band on the positioning clamp and pull out the rubber band at a certain distance, and the first clamping jaw and the second clamping jaw can reversely rotate in the horizontal direction; and the glue supplying part is provided with glue, and the glue supplying part can move along the left and right directions so that the end part of the rubber band on the second clamping jaw can be adhered with the glue.

The method has the following beneficial effects: when in processing, the coiled rubber band is placed on the feeding mechanism, the end part of the rubber band is clamped by the positioning clamp, the second clamping jaw can move along the left-right direction and clamp the end part of the rubber band on the positioning clamp, meanwhile, the positioning clamp loosens the rubber band, the second clamping jaw reversely moves to the initial position and pulls out the rubber band with a certain distance, and the positioning clamp clamps the rubber band again; then, the first clamping jaw clamps the rubber band, the shearing mechanism shears the rubber band to obtain a section of rubber band with required length, and two ends of the section of rubber band are respectively clamped by the first clamping jaw and the second clamping jaw; the glue supply piece moves along the left and right directions, and the end part of the rubber band on the second clamping jaw is adhered to the glue on the glue supply piece; and finally, the first clamping jaw and the second clamping jaw reversely rotate in the horizontal direction, so that the two ends of the rubber band are opposite and mutually attached, and the bonding of the rubber band is realized. The vertical rubber band machine can realize automatic shearing and automatic bonding in the rubber band production process, improve the production efficiency and reduce the labor cost.

According to some embodiments of the invention, the first jaw is movable in a vertical direction.

According to some embodiments of the invention, a glue containing groove is formed in the surface of the glue supply piece along the vertical direction, glue is arranged in the glue containing groove, the end part of the rubber band clamped by the second clamping jaw can be inserted into the glue containing groove, a glue supply hole is formed in the upper part of the glue supply piece, the glue supply hole is communicated with the glue containing groove, and the glue can flow into the glue containing groove through the glue supply hole.

According to some embodiments of the present invention, the glue supply hole is arranged along a left-right direction, an opening is arranged on a side surface of the glue supply member, the opening penetrates through the glue supply member along the left-right direction and is communicated with the glue supply hole, the glue supply member is coaxially provided with a through hole and a threaded hole along a vertical direction, the through hole and the threaded hole are both communicated with the opening, the through hole is located above the opening, and the threaded hole is located below the opening.

According to some embodiments of the invention, the bottom of the glue containing groove is provided with a recovery hole and an inclined surface inclined towards the inside of the glue containing groove, and the glue can flow into the recovery hole along the inclined surface.

According to some embodiments of the invention, the glue supplying device further comprises a glue supplying bracket which is arranged on the rack in a sliding manner along the left-right direction, the glue supplying piece is arranged on the glue supplying bracket, and the glue supplying piece can move along the left-right direction relative to the glue supplying bracket.

According to some embodiments of the invention, the glue supply bracket is provided with a locking chuck which can clamp the upper part of the second clamping jaw in the front-back direction.

According to some embodiments of the invention, the second clamping jaw comprises a first clamping head and a second clamping head, the first clamping head and the second clamping head can move in a front-back direction towards or away from each other, the first clamping head is provided with a first semicircular hole, the second clamping head is provided with a second semicircular hole corresponding to the first semicircular hole, the first semicircular hole and the second semicircular hole can mutually enclose a through hole, the end part of the rubber band can penetrate through the through hole, and the inner diameter of the through hole is smaller than the inner diameter of the rubber band.

According to some embodiments of the invention, the first semicircular hole is arranged on one side of the first chuck, the other side of the first chuck is provided with a guide hole, the guide hole is a major arc hole, the second chuck is provided with a matching plane, the guide hole and the matching plane can jointly enclose a guide space, the through hole and the guide space are coaxially arranged, the end part of the rubber band can sequentially penetrate through the through hole and the guide space, and the inner diameter of the guide space is larger than that of the rubber band.

According to some embodiments of the invention, the pilot hole is provided with a fillet at the major arc edge.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a portion A of FIG. 1;

FIG. 3 is a schematic structural view of the cutting mechanism and the positioning clip according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a blanking mechanism in an embodiment of the present invention;

FIG. 5 is a schematic structural view of the glue supplying part and the second clamping jaw in the embodiment of the invention;

FIG. 6 is a schematic view of a portion of the enlarged structure at B in FIG. 5;

FIG. 7 is a schematic view of a second jaw side of an embodiment of the present invention;

FIG. 8 is an enlarged partial view of the structure at C in FIG. 7;

FIG. 9 is a schematic view of the other side of the second jaw in an embodiment of the present invention;

FIG. 10 is an enlarged partial schematic view of FIG. 9 at D;

FIG. 11 is a schematic structural view of a glue supplying bracket and a glue supplying member according to an embodiment of the present invention;

FIG. 12 is an enlarged partial view of FIG. 11 at E;

FIG. 13 is an enlarged partial view of FIG. 11 at F;

FIG. 14 is a schematic structural view of a second clamping jaw clamping one end of a rubber band in the embodiment of the invention;

fig. 15 is a schematic structural view of the second clamping jaw clamping the other side of one end of the rubber band in the embodiment of the invention.

Reference numerals: the automatic glue feeding device comprises a rack 100, a feeding mechanism 200, a rubber band 300, a positioning clamp 400, a cutting mechanism 500, a second clamping jaw 600, a first clamping head 610, a first semicircular hole 611, a guide hole 612, a second clamping head 620, a second semicircular hole 621, a matching plane 622, a through hole 630, a guide space 640, a glue supply piece 700, a glue containing groove 710, a glue supply hole 720, an opening 730, a through hole 740, a threaded hole 750, an inclined plane 760, a glue supply support 800, a locking clamping head 810, a blanking mechanism 900 and a clamping plate 910.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the rubber band 300 of the present invention is not a structure of the present invention, and the rubber band 300 is introduced to illustrate the structure and or function. It is to be understood that the positional references, such as upper, lower, front, rear, left, right, etc., are based on the positional references shown in the drawings and are intended to facilitate the description of the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have the particular orientation, be constructed and operated in the particular orientation, and is therefore not to be considered as limiting the invention.

In the description of the invention, a plurality means two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 15, the invention discloses a vertical elastic sewing machine, which comprises a frame 100, wherein a feeding mechanism 200, a positioning clamp 400, a shearing mechanism 500, a first clamping jaw, a second clamping jaw 600 and a glue supply member 700 are sequentially arranged on the frame 100 along the left-right direction.

Wherein, feed mechanism 200 is used for holding rubber band 300, but the vertical setting of fixation clamp 400 is held or is loosened the tip of rubber band 300, but the shearing mechanism 500 is used for cutting off rubber band 300, but the vertical setting of first clamping jaw is held or is loosened rubber band 300, but the vertical setting of second clamping jaw 600 is held or is loosened rubber band 300, but second clamping jaw 600 can be followed left right direction and slided in order to be close to or keep away from fixation clamp 400, but the tip of the rubber band 300 on the fixation clamp 400 of second clamping jaw 600 centre gripping and pull out the rubber band 300 of certain distance, first clamping jaw and second clamping jaw 600 can be in the antiport on the horizontal direction, it is provided with glue to supply glue 700, it can follow left right direction and remove so that the glue can be glued to the tip of the rubber band 300 on the second clamping jaw 600 to supply glue 700.

It can be understood that, during processing, the coiled rubber band 300 is placed on the feeding mechanism 200, the end of the rubber band 300 is clamped by the positioning clamp 400, the second clamping jaw 600 can move in the left-right direction and clamp the end of the rubber band 300 on the positioning clamp 400, meanwhile, the positioning clamp 400 loosens the rubber band 300, the second clamping jaw 600 moves back to the initial position in the reverse direction and pulls out the rubber band 300 with a certain distance, and the positioning clamp 400 clamps the rubber band 300 again; then, the first clamping jaw clamps the rubber band 300, the cutting mechanism 500 cuts the rubber band 300 to obtain a section of rubber band 300 with the required length, and two ends of the section of rubber band 300 are respectively clamped by the first clamping jaw and the second clamping jaw 600; the glue supplying member 700 moves in the left-right direction, and the end of the rubber band 300 on the second clamping jaw 600 is adhered to the glue on the glue supplying member 700; finally, the first clamping jaw and the second clamping jaw 600 reversely rotate in the horizontal direction, so that two ends of the rubber band 300 are opposite and mutually attached, and the bonding of the rubber band 300 is realized. The vertical rubber band machine can realize automatic cutting and automatic bonding in the production process of the rubber band 300, improve the production efficiency and reduce the labor cost.

It should be noted that, in fig. 1, the first jaw is disposed between the cutting mechanism 500 and the second jaw 600, and the first jaw is not shown in fig. 1 because it blocks the cutting mechanism 500. Specifically, the first jaw may be identical in structure to the second jaw 600.

In addition, as shown in fig. 3, which is a schematic structural view of the cutting mechanism 500 and the positioning clip 400, the cutting mechanism can be opened and closed in the front-back direction to cut the rubber band 300, and the positioning clip 400 is disposed on the left side of the cutting mechanism.

Referring to fig. 4, in some embodiments of the present invention, a blanking mechanism 900 is further included, and is disposed on the frame 100 and used for blanking the bonded elastic ribbon 300. Specifically, the blanking mechanism 900 includes two clamping plates 910 capable of moving relatively, and a zigzag clamping groove is formed at the lower end of the clamping plate 910, so that the rubber band 300 can be clamped in the clamping groove after the two clamping plates 910 move relatively.

In some embodiments of the invention, the first jaw is movable in a vertical direction. When the second clamping jaw 600 is close to the positioning clamp 400 in the left-right direction, the first clamping jaw may move in the vertical direction to avoid the second clamping jaw 600, and of course, the first clamping jaw may not move in the vertical direction, and the first clamping jaw only needs to be opened by a distance enough for the second clamping jaw 600 to pass through.

Referring to fig. 13, in some embodiments of the present invention, a glue containing groove 710 is formed on a surface of the glue supplying member 700 along a vertical direction, glue is disposed in the glue containing groove 710, an end of the rubber band 300 clamped by the second clamping jaw 600 can be inserted into the glue containing groove 710, a glue supplying hole 720 is formed on an upper portion of the glue supplying member 700, the glue supplying hole 720 is communicated with the glue containing groove 710, and the glue can flow into the glue containing groove 710 through the glue supplying hole 720. When processing, the glue that supplies the hole 720 outflow of gluing can flow down along the flourishing gluey groove 710 that vertical direction set up for hang glue on the flourishing gluey groove 710, supply gluey piece 700 to remove along left right direction and can make the tip of rubber band 300 insert flourishing gluey inslot 710, thereby make the tip of rubber band 300 glue, then supply gluey piece 700 to remove the normal position. The glue containing groove 710 is arranged in the vertical direction, so that the glue can flow down along the glue containing groove 710 by using the gravity of the glue, the glue can be always hung on the glue containing groove 710 in the vertical direction, and the end part of the rubber band 300 can be conveniently adhered.

Referring to fig. 13, in some embodiments of the present invention, the glue supplying hole 720 is disposed along a left-right direction, an opening 730 is disposed on a side surface of the glue supplying member 700, the opening 730 penetrates the glue supplying member 700 along the left-right direction and is communicated with the glue supplying hole 720, the glue supplying member 700 is coaxially disposed along a vertical direction with a through hole 740 and a threaded hole 750, the through hole 740 and the threaded hole 750 are both communicated with the opening 730, the through hole 740 is located above the opening 730, and the threaded hole 750 is located below the opening 730. Can place the pipeline in the confession gluey hole 720 in order to glue the groove 710 in the flourishing glue supply glue, use fasteners such as bolt to pass through-hole 740 and screw up in screw hole 750, owing to the side that supplies to glue piece 700 is provided with opening 730, the back is screwed up to fasteners such as bolt, can follow vertical direction compression opening 730 for supply to glue piece 700 upper portion and produce deformation, and then make and supply gluey hole 720 to produce deformation and reduce, can play the fixed action to setting up in supplying the pipeline in gluey hole 720.

Referring to fig. 12, in some embodiments of the present invention, the bottom of the glue tank 710 is provided with a recovery hole and a slope 760 inclined toward the inside of the glue tank 710, and the glue may flow into the recovery hole along the slope 760. Specifically, the recycling hole can be communicated with another pipeline, and the glue flowing down along the inclined plane 760 can flow into the recycling device through the other pipeline, so that the recycling of the glue can be realized, and the waste of the glue is reduced. In addition, the inclined surface 760 can prevent glue from overflowing from the bottom of the glue containing groove 710, so that more glue can be contained in the glue containing groove 710.

As shown in fig. 5, 6 and 11, in some embodiments of the present invention, the present invention further includes a glue supply bracket 800 slidably disposed on the frame 100 along the left-right direction, the glue supply member 700 is disposed on the glue supply bracket 800, and the glue supply member 700 can move along the left-right direction relative to the glue supply bracket 800. During gluing, the glue supply bracket 800 can move a distance in the left-right direction to be close to the second clamping jaw 600, and then the glue supply member 700 can move a distance again relative to the glue supply bracket 800 so that the end of the rubber band 300 clamped by the second clamping jaw 600 can be inserted into the glue containing groove 710 on the glue supply member 700. Specifically, but supply gluey support 800 quick travel to the position that is close to second clamping jaw 600 in order to improve and supply gluey efficiency, nevertheless supply gluey support 800's quick travel to be unfavorable for guaranteeing to supply gluey precision because supply to glue support 800 quick travel back probably because of factors such as inertia make final stop position production error, and then make rubber band 300 tip insert the degree of depth nonconformity in flourishing gluey groove 710, influence product quality. Therefore, the glue supplying member 700 is required to move to the position where the glue is required to be supplied, and the movement of the glue supplying member 700 can be performed at a low speed, so as to achieve more accurate glue supplying precision. The glue supply member 700 performs the supply of the glue by the above two movements, and the glue supply accuracy can be ensured while the glue supply efficiency is improved.

Referring to fig. 6 and 11, in some embodiments of the present invention, a locking chuck 810 is disposed on the glue supply bracket 800, and the locking chuck 810 can clamp the upper portion of the second clamping jaw 600 in the front-rear direction. Because the second clamping jaw 600 is vertically arranged and is slender, and the driving part for controlling the clamping action of the second clamping jaw 600 is mostly arranged at the lower part of the second clamping jaw 600, in order to prevent the upper part of the second clamping jaw 600 from deforming when clamping the rubber band 300, the anti-loosening chuck 810 can be arranged to further clamp the upper part of the second clamping jaw 600.

Referring to fig. 6 to 8, in some embodiments of the present invention, the second jaw 600 includes a first collet 610 and a second collet 620, the first collet 610 and the second collet 620 may move toward or away from each other in a front-rear direction, the first collet 610 is provided with a first semicircular hole 611, the second collet 620 is provided with a second semicircular hole 621 corresponding to the first semicircular hole 611, the first semicircular hole 611 and the second semicircular hole 621 may surround each other to form a through hole 630, an end of the rubber band 300 may pass through the through hole 630, and an inner diameter of the through hole 630 is smaller than an inner diameter of the rubber band 300. Specifically, first semicircle orifice 611 on the first chuck 610 can be arranged along vertical direction and has a plurality ofly, and second semicircle orifice 621 on the second chuck 620 also can be arranged along vertical direction correspondence and has a plurality ofly, when second clamping jaw 600 centre gripping rubber band 300, can follow many rubber bands 300 of vertical direction centre gripping, and the adhesion glue in the flourishing gluey groove 710 of the tip also can be inserted in step of many rubber bands 300, can improve machining efficiency.

Referring to fig. 9 and 10, in some embodiments of the present invention, a first semicircular hole 611 is disposed at one side of a first clamping head 610, a guide hole 612 is disposed at the other side of the first clamping head 610, the guide hole 612 is a major arc hole, a matching plane 622 is disposed on a second clamping head 620, the guide hole 612 and the matching plane 622 together enclose a guide space 640, a through hole 630 and the guide space 640 are coaxially disposed, an end of a rubber band 300 can sequentially pass through the through hole 630 and the guide space 640, and an inner diameter of the guide space 640 is greater than an inner diameter of the rubber band 300. The perforation 630 can provide the clamp force for the tip of rubber band 300, but because the rubber band 300 material is softer, it produces the deformation easily in tip position after by the centre gripping, and the setting of direction space 640 can provide the direction for rubber band 300, corrects the rubber band 300 that is warp by the centre gripping, makes the tip of rubber band 300 can original extending direction (be about the direction in fig. 1) stretch into flourishing gluey inslot 710.

In some embodiments of the present invention, the guide hole 612 is provided with a rounded corner at the edge of the major arc. The fillet can further improve the guide efficiency of the guide hole 612, so that the rubber band 300 to be clamped can enter the guide space 640 more quickly under the guide effect of the fillet.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.